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Jersey core server implementation
/*
* Copyright (c) 2011, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.server.model.internal;
import java.io.Flushable;
import java.io.IOException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.List;
import jakarta.ws.rs.ProcessingException;
import jakarta.ws.rs.core.GenericEntity;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.sse.SseEventSink;
import org.glassfish.jersey.server.ContainerRequest;
import org.glassfish.jersey.server.internal.inject.ConfiguredValidator;
import org.glassfish.jersey.server.model.Invocable;
import org.glassfish.jersey.server.model.Parameter;
import org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource;
import org.glassfish.jersey.server.spi.internal.ParameterValueHelper;
import org.glassfish.jersey.server.spi.internal.ResourceMethodDispatcher;
import org.glassfish.jersey.server.spi.internal.ValueParamProvider;
/**
* An implementation of {@link ResourceMethodDispatcher.Provider} that
* creates instances of {@link ResourceMethodDispatcher}.
*
* @author Paul Sandoz
* @author Marek Potociar
*/
class JavaResourceMethodDispatcherProvider implements ResourceMethodDispatcher.Provider {
private final Collection allValueProviders;
JavaResourceMethodDispatcherProvider(Collection allValueProviders) {
this.allValueProviders = allValueProviders;
}
@Override
public ResourceMethodDispatcher create(final Invocable resourceMethod,
final InvocationHandler invocationHandler,
final ConfiguredValidator validator) {
final List> valueProviders =
ParameterValueHelper.createValueProviders(allValueProviders, resourceMethod);
final Class returnType = resourceMethod.getHandlingMethod().getReturnType();
ResourceMethodDispatcher resourceMethodDispatcher = null;
if (Response.class.isAssignableFrom(returnType)) {
resourceMethodDispatcher =
new ResponseOutInvoker(resourceMethod, invocationHandler, valueProviders, validator);
} else if (returnType != void.class) {
if (returnType == Object.class || GenericEntity.class.isAssignableFrom(returnType)) {
resourceMethodDispatcher =
new ObjectOutInvoker(resourceMethod, invocationHandler, valueProviders, validator);
} else {
resourceMethodDispatcher =
new TypeOutInvoker(resourceMethod, invocationHandler, valueProviders, validator);
}
} else {
// return type is void
int i = 0;
for (final Parameter parameter : resourceMethod.getParameters()) {
if (SseTypeResolver.isSseSinkParam(parameter.getRawType())) {
resourceMethodDispatcher =
new SseEventSinkInvoker(resourceMethod, invocationHandler, valueProviders, validator, i);
break;
}
i++;
}
if (resourceMethodDispatcher == null) {
resourceMethodDispatcher = new VoidOutInvoker(resourceMethod, invocationHandler, valueProviders, validator);
}
}
return resourceMethodDispatcher;
}
private abstract static class AbstractMethodParamInvoker extends AbstractJavaResourceMethodDispatcher {
private final List> valueProviders;
AbstractMethodParamInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator) {
super(resourceMethod, handler, validator);
this.valueProviders = valueProviders;
}
final Object[] getParamValues(ContainerRequest request) {
return ParameterValueHelper.getParameterValues(valueProviders, request);
}
}
private static final class SseEventSinkInvoker extends AbstractMethodParamInvoker {
private final int parameterIndex;
SseEventSinkInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator,
final int parameterIndex) {
super(resourceMethod, handler, valueProviders, validator);
this.parameterIndex = parameterIndex;
}
@Override
protected Response doDispatch(final Object resource, final ContainerRequest request) throws ProcessingException {
final Object[] paramValues = getParamValues(request);
invoke(request, resource, paramValues);
final SseEventSink eventSink = (SseEventSink) paramValues[parameterIndex];
if (eventSink == null) {
throw new IllegalArgumentException("SseEventSink parameter detected, but not found.");
} else if (eventSink instanceof Flushable) {
try {
((Flushable) eventSink).flush();
} catch (IOException e) {
// ignore.
}
}
return Response.ok().entity(eventSink).build();
}
}
private static final class VoidOutInvoker extends AbstractMethodParamInvoker {
VoidOutInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator) {
super(resourceMethod, handler, valueProviders, validator);
}
@Override
protected Response doDispatch(final Object resource, final ContainerRequest containerRequest) throws ProcessingException {
invoke(containerRequest, resource, getParamValues(containerRequest));
return Response.noContent().build();
}
}
private static final class ResponseOutInvoker extends AbstractMethodParamInvoker {
ResponseOutInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator) {
super(resourceMethod, handler, valueProviders, validator);
}
@Override
protected Response doDispatch(Object resource, final ContainerRequest containerRequest) throws ProcessingException {
return Response.class.cast(invoke(containerRequest, resource, getParamValues(containerRequest)));
}
}
private static final class ObjectOutInvoker extends AbstractMethodParamInvoker {
ObjectOutInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator) {
super(resourceMethod, handler, valueProviders, validator);
}
@Override
protected Response doDispatch(final Object resource, final ContainerRequest containerRequest) throws ProcessingException {
final Object o = invoke(containerRequest, resource, getParamValues(containerRequest));
if (o instanceof Response) {
return Response.class.cast(o);
} else if (o != null) {
return Response.ok().entity(o).build();
} else {
return Response.noContent().build();
}
}
}
private static final class TypeOutInvoker extends AbstractMethodParamInvoker {
private final Type t;
TypeOutInvoker(
final Invocable resourceMethod,
final InvocationHandler handler,
final List> valueProviders,
final ConfiguredValidator validator) {
super(resourceMethod, handler, valueProviders, validator);
this.t = resourceMethod.getHandlingMethod().getGenericReturnType();
}
@Override
protected Response doDispatch(final Object resource, final ContainerRequest containerRequest) throws ProcessingException {
final Object o = invoke(containerRequest, resource, getParamValues(containerRequest));
if (o != null) {
if (o instanceof Response) {
return Response.class.cast(o);
}
return Response.ok().entity(o).build();
} else {
return Response.noContent().build();
}
}
}
}